Power Integrations LNK305PN Off-Line Switcher IC DIP-8

The Power Integrations LNK305PN Off-Line Switcher IC is an energy-efficient LinkSwitch-TN series device supporting output currents up to 360mA in a DIP-8 package. It integrates a 700V power MOSFET, control circuitry, and protection features into a single monolithic IC, creating a low component count solution for power supply designs.

Overview

The LNK305PN is designed as a replacement for linear and capacitor-fed (cap dropper) power supplies in applications requiring up to 360mA output current. It derives its start-up and operating power directly from the voltage on the DRAIN pin, removing the need for a separate bias supply in buck or flyback converter topologies. Its fully integrated auto-restart circuit provides protection against output short-circuits and open control loop faults, supporting system reliability and safety while minimising external component requirements.

Key Features

• Universal Input: Operates from an 85V to 265V AC input range, suitable for global applications.
• High Integration: Combines a 700V MOSFET, oscillator, on/off controller, and thermal shutdown in one IC.
• Reduced EMI: Integrated frequency jittering reduces electromagnetic interference by approximately 10dB.
• Comprehensive Protection: Built-in cycle-by-cycle current limiting, hysteretic thermal protection, and auto-restart against overloads and faults.
• Low Standby Power: Typically 50mW at 115VAC and 80mW at 230VAC in a self-powered buck configuration with no load.

Physical Details

The unit measures 3 (width) x 2.5 (depth) x 4 (height) and weighs 1.542 g. The product is supplied in a DIP-8 package.

Choose the Power Integrations LNK305PN Off-Line Switcher IC for universal AC input power supply designs requiring up to 360mA output current.